For my Acer XB270HU I've tried the following 20 foot cables and neither are working:
#1
Monoprice SlimRun AV DisplayPort Fiber Cable:
https://www.monoprice.com/product?p_id=21804
#2
Tripp Lite DP > HDMI cable:
https://www.amazon.com/gp/product/B0716N9LJM
In combination with Active HDMI > DP...